Year | Value | 2021 | 14,662.2 | 2020 | 14,589.3 | 2019 | 14,614 | 2018 | 14,598.9 | 2017 | 14,519.2 | 2016 | 14,360 | 2015 | 14,340 | 2014 | 14,198 | 2013 | 14,195 | 2012 | 14,238 | 2011 | 14,368 | 2010 | 14,432 | 2009 | 14,544 | 2008 | 14,572 | 2007 | 14,650 | 2006 | 14,630 | 2005 | 14,650 | 2004 | 14,720 | 2003 | 13,730 | 2002 | 12,734 | 2001 | 11,736 | 2000 | 11,730 | 1999 | 10,710 | 1998 | 10,710 | 1997 | 10,700 | 1996 | 10,710 | 1995 | 10,710 | 1994 | 10,720 | 1993 | 10,720 | 1992 | 10,830 | 1991 | 10,800 | 1990 | 10,800 | 1989 | 10,770 | 1988 | 10,730 | 1987 | 10,700 | 1986 | 10,670 | 1985 | 10,610 | 1984 | 10,590 | 1983 | 10,550 | 1982 | 10,510 | 1981 | 10,510 | 1980 | 10,510 | 1979 | 10,510 | 1978 | 10,510 | 1977 | 10,490 | 1976 | 10,480 | 1975 | 10,470 | 1974 | 10,460 | 1973 | 10,450 | 1972 | 10,440 | 1971 | 10,420 | 1970 | 10,420 | 1969 | 10,400 | 1968 | 10,400 | 1967 | 10,380 | 1966 | 10,360 | 1965 | 10,360 | 1964 | 10,360 | 1963 | 10,350 | 1962 | 10,350 | 1961 | 10,350 |
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